A survey of pet owners found that on average, they spend $1,225 annually per pet, with a standard deviation of $275. Between which two amounts would you expect 95% of the survey's respondents to spend annually per pet if the sample is approximately normal and comes from a normally distributed population?

$675 and $1,500

$675 and $1,775

$950 and $1,500

$950 and $1,775

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5 June, 21:29

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Chocolate · Answer 1

95% is two standard deviations ...

1,225 - (275+275) = 675

1,225 + (275+275) = 1775

The answer is B, 675 to 1,775.